https://bugs.webkit.org/show_bug.cgi?id=96696

[FullScreen] entering/leaving fullscreen results in temporary glitches on the screen (Part I)
PR #180866

Reviewed by Rob Buis.
Patch by Antonio Gomes <agomes@rim.com>

Internally reviewed by Jacky Hajiang and Arvid Nilsson.

Patch replaces the async call to zoomAboutPoint (via scheduling it with a one-shot-0-timer).
Instead, at its single call site, we inline most of the previous scheduleZoomAboutPoint code,
and in the end call zoomAboutPoint directly.

Change was estimulated by Arvid's comment on PRzilla: "There is no longer any reason to have
"zoom about point" be async.. That was a hack I did for BB6, back when we were doing everything
on the WK read and needed manual time slicing betwren rendering and user interaction."

The bigger goal though is to be able to remove screen glitches while entering/leaving
fullscreen mode: since we could accurately use the count-based suspend/resume backing
store mechanism to prevent it.

* Api/WebPage.cpp:
(WebKit):
(BlackBerry::WebKit::WebPagePrivate::WebPagePrivate):
(BlackBerry::WebKit::WebPagePrivate::setLoadState):
(BlackBerry::WebKit::WebPagePrivate::setViewportSize):
* Api/WebPage_p.h:
(WebPagePrivate):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@128603 268f45cc-cd09-0410-ab3c-d52691b4dbfc